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Dry heat sterilization of an object is one of the earliest forms of sterilization practiced. It uses hot air that is either free from water vapor or has very little of it, where this moisture plays a minimal or no role in the process of sterilization.
Dry heat sterilizer. Dry heat was the first method of sterilization and is a longer process than moist heat sterilization. The destruction of microorganisms through the use of dry heat is a gradual phenomenon. With longer exposure to lethal temperatures, the number of killed microorganisms increases.
They are much smaller than autoclaves but can still be as effective. They can be more rapid than an autoclave and higher temperatures can be reached compared to other means. As they use dry heat instead of moist heat, some pathogens like prions, may not be killed by them every time, based on the principle of thermal inactivation by oxidation.
used as primary bacterial/cell filters in procedures as toxin, immunoglobulin, etc. production, where the product gets denatured on heating •Air filter: like HEPA filter, used in various laboratories and clean rooms to produce lamellar air flow Radiation: •Gamma ray source: used in sterilization of heat-labile products like plastic or ...
Sterilization using steam can also be done at a temperature of 132 C (270 F), at a double pressure. [citation needed] Dry heat sterilization is performed at 170 C (340 F) for one hour or two hours at a temperature of 160 C (320 F). Dry heat sterilization can also be performed at 121 C, for at least 16 hours. [17]
“Cans of beans undergo a process of heat treatment known as retorting, where the temperature of the can is raised well above the boiling point of water,” explains Quoc Le. “This process ...
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